Food for thought
I have 2 hopper 3 and 2 4k joeys all connect to same network/Router both hopper 3 A and hopper 3 B are all getting wifi from the same router.
Original Hopper A got internet (wireless) and that was bridged to feed internet to the it joey and the other hopper and it joey connect to that, but after last tech that came out that stoped working so i had to use wireless connection to both hoppers.
You can try bridgeing one of the hopper 3 and see what happen, but I would disable internet from other hopper first, I dont remeber button command to bring up bridging though